On Wed, Jun 22, 2016 at 04:55:26PM +0800, Pan Wen wrote:
> add Hisilicon BVT I2C controller driver support.
>
> Signed-off-by: Pan Wen <wenpan@xxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/i2c/i2c-hibvt.txt | 24 +
> drivers/i2c/busses/Kconfig | 10 +
> drivers/i2c/busses/Makefile | 1 +
> drivers/i2c/busses/i2c-hibvt.c | 736 +++++++++++++++++++++
> 4 files changed, 771 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/i2c/i2c-hibvt.txt
> create mode 100644 drivers/i2c/busses/i2c-hibvt.c
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt b/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt
> new file mode 100644
> index 0000000..3aa2cee
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-hibvt.txt
> @@ -0,0 +1,24 @@
> +Hisilicon BVT I2C master controller
> +
> +Required properties:
> +- compatible: should be "hisilicon,hibvt-i2c".
> +- reg: physical base address of the controller and length of memory mapped.
> + region.
> +- interrupts: interrupt number to the cpu.
> +- clocks: phandles to input clocks.
> +
> +Optional properties:
> +- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000.
> +
> +Other properties:
> +see Documentation/devicetree/bindings/i2c/i2c.txt.
> +
> +Examples:
> +i2c_bus0: i2c@12110000 {
> + compatible = "hisilicon,hibvt-i2c";
> + reg = <0x12110000 0x100>;
> + interrupts = <20>;
> + clocks = <&crg_ctrl HI3516CV300_APB_CLK>;
> + clock-names = "apb_pclk";
> + clock-frequency = <100000>;
> +};
The clock-names property was not described above, and the driver doesn't
appear to use it.
Please explciitly describe the clock-names you expect, and use them in
the driver. If there is a single clock, then you can simply drop the
clock-names property from the example.
Thanks,
Mark.
> + i2c->clk = devm_clk_get(&pdev->dev, NULL);
> + if (IS_ERR(i2c->clk)) {
> + dev_err(i2c->dev, "cannot get clock\n");
> + return -ENOENT;
> + }
> + clk_prepare_enable(i2c->clk);
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